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WO2014181283A1 - Dispositif et procédé de réduction de pression - Google Patents

Dispositif et procédé de réduction de pression Download PDF

Info

Publication number
WO2014181283A1
WO2014181283A1 PCT/IB2014/061293 IB2014061293W WO2014181283A1 WO 2014181283 A1 WO2014181283 A1 WO 2014181283A1 IB 2014061293 W IB2014061293 W IB 2014061293W WO 2014181283 A1 WO2014181283 A1 WO 2014181283A1
Authority
WO
WIPO (PCT)
Prior art keywords
pressure reduction
pressure
reduction device
fluid
devices
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/IB2014/061293
Other languages
English (en)
Inventor
Steen Brummerstedt Iversen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Steeper Energy ApS
Original Assignee
Steeper Energy ApS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Steeper Energy ApS filed Critical Steeper Energy ApS
Priority to US14/889,518 priority Critical patent/US10108207B2/en
Priority to CA2911975A priority patent/CA2911975C/fr
Priority to EP14725773.7A priority patent/EP2994649A1/fr
Publication of WO2014181283A1 publication Critical patent/WO2014181283A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D16/00—Control of fluid pressure
    • G05D16/20—Control of fluid pressure characterised by the use of electric means
    • G05D16/2006—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means
    • G05D16/2013—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means
    • G05D16/2026—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means with a plurality of throttling means
    • G05D16/204—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means with a plurality of throttling means the plurality of throttling means being arranged in parallel
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D16/00—Control of fluid pressure
    • G05D16/20—Control of fluid pressure characterised by the use of electric means
    • G05D16/2006—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means
    • G05D16/2013—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means
    • G05D16/2026—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means with a plurality of throttling means
    • G05D16/2033—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means with a plurality of throttling means the plurality of throttling means being arranged in series
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/02—Energy absorbers; Noise absorbers
    • F16L55/027—Throttle passages

Definitions

  • the present invention relates to the area of pressure reduction devices for use in a high pressure and high temperature processing equipment.
  • valve parts i.e. the valve and the seat
  • wear is further increased when processing materials with a content of abrasive particles.
  • Using more valves in order to allow lower velocities will dramatically increase the cost of the processing equipment and will not totally eliminate the problem of wear.
  • an improved pressure reduction device and a method would be advantageous, and in particular a pressure reduction device and a method that provide for a more efficient pressure reduction and/or are less prone to wear from high flow velocities of processed fluids with abrasive components.
  • the invention preferably seeks to mitigate, alleviate or eliminate one or more of the above mentioned disadvantages singly or in any combination.
  • This objective of the invention is obtained in a first aspect of the invention by providing a pressure reduction for use in processing equipment handling high pressure fluid, where the pressure reduction device comprises at least one tubular element with a first and a second end, arranged to receive a pressurized fluid at the first end and with a length and internal cross section adapted to reduce the pressure of the fluid to a predetermined level when leaving the second end, where the length, the cross sectional area and the number of tubular elements are chosen to achieve an average flow velocity within each tubular element of less than 30m/s.
  • the actual pressure reduction in the pressure reduction device will depend on the number of tubular elements and further on the length and the cross sectional area available for flow, i.e. the inner area.
  • the length, the cross sectional area and the number of tubular elements are chosen to achieve an average flow velocity within each tubular element of less than 20m/s, more preferred less than 15m/s and most preferred less than 10m/s.
  • each tubular element is in the range 1 mm to 32mm, preferably in the range 1 mm to 25mm. Desirably the range is within 1 mm and 16mm, preferably 1.7mm to 12mm and most desired 2.5mm to 10mm.
  • An equivalent cross sectional area for tubular elements having a profile deviating from a circular profile may apply.
  • each tubular element is 10m to 1000m, preferably 10m to 500m, more preferred 10m to 250m and most preferred 10m to 100m.
  • a further aspect of the invention relates to a pressure reduction unit enabling stepwise pressure reduction using a combination of the pressure reduction devices according to the invention.
  • this aspect is realized through a pressure reduction unit comprising two or more pressure reduction devices according to the preceding claims are arranged in series in a piping arrangement connecting these and directing the fluid to the pressure reduction devices, where for a pressure reduction device a flow bypass piping comprising an on/off valve may be provided and where pressure measuring devices are provided adapted for measuring the pressure before and after the pressure reduction in each pressure reduction device.
  • a pressure reduction device for a pressure reduction device a flow bypass piping comprising an on/off valve may be provided and where pressure measuring devices are provided adapted for measuring the pressure before and after the pressure reduction in each pressure reduction device.
  • This will allow for selection of a specific combination of pressure reduction devices for a specific pressurized fluid to be treated in the pressure reduction device.
  • the cross sectional areas of the tubular elements may vary from one pressure reduction device to the next. Also the length and the number of tubular elements may vary between the individual pressure reduction devices.
  • the pressure reduction unit is adapted for automatic operation through further comprising a control unit, where a pressure measuring device is adapted for providing an input to a control unit, where the control unit is adapted to provided a control signal to valve activation devices for opening or closing the on/off valve according to a predetermined control strategy residing in the control unit.
  • a heating device for one or more of the pressure reduction devices is provided for heating the pressure reduction device and hereby adjusting the viscosity of the fluid and hence adjusting the pressure reduction. This gives a possibility of a more precise adjustment of the pressure reduction.
  • the number of pressure reduction devices is at least 4, preferably 6 and even more preferred 8 and where an on/off valve is placed in conjunction with each pressure reduction unit.
  • a pressure reduction device adapted for pre-operation procedures is provided, where the medium to be pressure reduced is water or a similar low viscosity fluid.
  • a parallel coupled pressure reduction device provided in a parallel piping arrangement, and further valve means are provided for opening and closing the flow to the parallel coupled pressure reduction device.
  • Such arrangement will increase availability of the pressure reduction unit, as the additional device may be switched in, e.g. when the other device is in need of maintenance, and further the capacity may be increased if both parallel coupled devices are switched in, i.e. open for flow.
  • a flushing device capable of flushing the pressure reduction device when not in an operational mode.
  • the pressure reduction unit comprises parallel arranged pressure reduction devices, that may be coupled in or out for flushing or other maintenance.
  • a filtering device is inserted in the piping upstream in relation to the first pressure reduction device.
  • potentially obstructing elements e.g. stones, larger fibres or coke originating from the process, may be kept out of the pressure reduction unit and hereby avoiding clogging of the pressure reduction system.
  • the pressure reduction unit according to the invention is operated according to an inventive method.
  • the method according to the invention for operating the processing equipment comprising a pressure reduction unit according to the invention, is characterized by that the pressure reduction method comprises switching in or out one or more on/off valves in bypass streams and hence directing the fluid stream to a desired combination of pressure reduction devices.
  • the method for pressure reduction comprises switching in or out one or more on/off valves in bypass streams and hence directing the fluid stream to a desired combination of pressure reduction devices.
  • step e. repeating the step e. for each pressure reduction device until a predetermined pressure level has been reached.
  • the method comprises bypassing all but a final pressure reduction device in case the fluid in the processing equipment is a low viscosity startup or close down fluid.
  • the temperature is in one or more steps of the pressure reduction increased relative to the input temperature of the fluid.
  • the temperature is preferably increased to between 120°C and 180°C. In any case it is crucial that the temperature is kept above 80°C, in order to avoid heavier components in the fluid to coagulate and form potentially obstructing objects.
  • the pressure reduction unit may find use in a processing plant comprising a number of such pressure reduction units, where the processing plant comprises on the one side of the pressure reduction unit a high pressure liquid reaction zone and on the other side of the pressure reduction device comprises a liquid separation zone.
  • This may for example be a processing plant for converting material containing carbonaceous parts into a liquid hydrocarbon in a continuous process.
  • Such fluid stream will contain a significant amount of abrasive particles, and due to the absence of moving parts that are influenced by these particles it will allow for a significant reduction of interruption in the process and hence be able to actually make a steady long term continuous process available.
  • the invention is particularly, but not exclusively, advantageous for obtaining a reliable and consistent pressure reduction in a high pressure system where a content of abrasive particles is present in a fluid.
  • FIG. 1 shows a schematic configuration of a pressure reduction unit according to the invention
  • FIG. 2 shows schematically a single step pressure reduction device according to the invention
  • FIG. 3 shows in perspective a pressure reduction device according to the invention
  • FIG. 4 shows a schematic diagram with the pressure reduction device according to the invention built into a high pressure process plant
  • FIG. 5 is a flow-chart of a method according to the invention.
  • FIG. 1 a schematic view of a pressure reduction unit appears, where the configuration of the pressure reduction devices and the connecting piping and valves are visible.
  • the diameter of each tubular element of the pressure reduction device and further the length of these are determined according to process parameters, where the design criterium preferably is so that the average flow velocity in a tubular element is kept below 30m/s, preferably even lower e.g. 20m/s or 10m/s.
  • a screen or filter 21 Prior to the pressure reduction devices a screen or filter 21 has been introduced in the flow system in order to filter out possible larger components.
  • a first valve 1 distributes the flow to further valves 2,3 through piping, where valves 2,3 each controls access to a string of pressure reduction devices, for valve 2 the pressure reduction devices 5, 9, etc and for valve 3 pressure reduction devices 10, etc.
  • the valve 2 may additionally control access to additional strings available through valve 4.
  • Valves 7,8 indicate that access to parallel pressure reduction devices may be available in case a need for maintenance exists for a particular pressure reduction device, where the access to such for that reason may need to be shut down.
  • pressure reduction device 5 is shut down through closure of valves 2,7, the flow may be directed to pressure reduction device 6 and back to pressure reduction device 9 for pressure reduction through operation of the valves 2,4,8,7.
  • FIG. 2 a pressure reduction device of a pressure reduction unit appears schematically. It appears that above and below the pressure reduction device 5 valves 1 1 , 12 are provided that connect a flushing system comprising a pump 13 and suitable piping connecting the pump to the valves.
  • the flushing preferably is carried out in an opposite direction of the normal flow direction of the pressure reduction device as the main location of the obstruction to be removed normally is at the inlet of the tubular element(s) of the pressure reduction device.
  • the flushing operation may be carried out when the pressure reduction device is closed out of the pressure reduction unit, i.e. when valves have closed the high pressure process system in relation to the pressure reduction device.
  • the tubular elements 22 may be elongate straight elements, however in order to reduce space consumption other shapes may be chosen, e.g. a coil shaped or a helix shaped element 22 may reduce the space needed significantly.
  • the length and cross sectional area are only shown for scematic purposes as the actual desired measures of the tubular elements are much different from these shown examples.
  • the desired length may be between 1 m and 1000m, dependent on the cross sectional area and the number of tubular elements provided.
  • the cross sectional area may vary within the range of areas corresponding to a diameter of between 1 mm and 10mm in a circular tubular element. Again the parameters that are variable are the number of tubes, the cross sectional area and the length, where these design parameter will be the desired flow velocity through each tubular element.
  • FIG. 4 shows an embodiment of a string of pressure reduction devices 5, 9, etc forming a pressure reduction unit according to the invention, where a multistage layout is introduced. In this case four stages or pressure reduction devices are used, where the individual stages in their function follow the single step, however where the pressure drop over the individual stage is smaller than in the single step embodiment, and where the resistance to wear is even more significant.
  • a bypass piping 23 is provided and for each bypass piping 23 an on/off closing valve 18 is provided.
  • a pressure sensor 14 is provided for measuring the fluid pressure and provides an input to a control unit 16 that will determine the opening or closing of one or more valves 14 according to a predetermined control strategy by providing a control signal through signal path 17.
  • the last pressure reduction device shown is preferably only used for clean fluid operations, such as water or other flushing fluids, and will not be part of a normal oparational configuration. This configuration will allow for a controlled pressure reduction.
  • a heating chamber 20 is provided for heating the entire pressure reduction unit. It may be foreseen that only a part of the pressure reduction unit is heated.
  • the purpose of the heater 20 is to increase/maintain the temperature of the pressure reduction unit and thereby be able to adjust the viscosity of the fluid in the pressure reduction unit, which again will have an influence on the pressure reduction due to the dependency on the viscosity.
  • the control unit 16 is providing a control signal to the heating unit 20 through signal path 19.
  • FIG. 5 a schematic diagram of a high pressure process plant appears, where the pressure reduction device forms an important part of this.
  • a fluid stream enters the processing plant and is pressurised and afterwards heated to a desired temperature. Pressure and temperature in such processes often exceeds 300 bar and 300 degree Celsius and may be even higher. After a reaction time in a reactor the fluid is cooled and the pressure must be reduced before a final separation of the individual components obtainable due to the stay in the reactor.
  • the invention is a significant element in achieving a continous process that may be performed at steady conditions for la ong time with limited repair compared to existing pressure reduction devices.
  • an automatic control including a predetermined control strategy where inputs are provided from the pressure sensor and where the control unit according to the predetermined control strategy opens or closed the on/off valves in the system and hence will establish a configuration of the pressure reduction devices in the pressure reduction unit that will ensure the desired output.

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Fluid Pressure (AREA)

Abstract

L'invention se rapporte à un dispositif de réduction de pression à utiliser dans un équipement de traitement manipulant des fluides à pression élevée et à température élevée avec un contenu de composants abrasifs, le dispositif de réduction de pression comprenant un certain nombre de tuyaux ayant une longueur et une coupe transversale interne conçues pour réduire la pression, la longueur, la coupe transversale et le nombre de tuyaux étant choisis pour avoir une vitesse d'écoulement moyenne dans chaque tuyau inférieure à 30 m/s.
PCT/IB2014/061293 2013-05-08 2014-05-08 Dispositif et procédé de réduction de pression Ceased WO2014181283A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US14/889,518 US10108207B2 (en) 2013-05-08 2014-05-08 Pressure reduction device and method
CA2911975A CA2911975C (fr) 2013-05-08 2014-05-08 Dispositif et procede de reduction de pression
EP14725773.7A EP2994649A1 (fr) 2013-05-08 2014-05-08 Dispositif et procédé de réduction de pression

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DKPA201300282 2013-05-08
DKPA201300282 2013-05-08

Publications (1)

Publication Number Publication Date
WO2014181283A1 true WO2014181283A1 (fr) 2014-11-13

Family

ID=50771533

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2014/061293 Ceased WO2014181283A1 (fr) 2013-05-08 2014-05-08 Dispositif et procédé de réduction de pression

Country Status (4)

Country Link
US (1) US10108207B2 (fr)
EP (1) EP2994649A1 (fr)
CA (1) CA2911975C (fr)
WO (1) WO2014181283A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018011139A1 (fr) 2016-07-11 2018-01-18 Steeper Energy Aps Procédé de production d'une huile renouvelable contenant de l'oxygène à faible teneur en soufre
DK179314B1 (en) * 2017-02-08 2018-04-30 Steeper Energy Aps Pressurization system for high pressure treatment system
DK201770074A1 (en) * 2017-02-08 2018-05-28 Steeper Energy Aps Pressure reduction in high pressure processing system

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK201770842A1 (en) * 2017-11-09 2019-05-21 Steeper Energy Aps Modular processing system
CN109114429B (zh) * 2018-08-16 2020-08-21 北京航天石化技术装备工程有限公司 一种减压系统的低压热力平衡方法
CN109027691B (zh) * 2018-08-16 2020-06-19 北京航天石化技术装备工程有限公司 一种减压系统的高压热力平衡方法
EP4308817B1 (fr) 2021-03-17 2025-12-17 Circlia Nordic ApS Système de pompage pour les convertisseurs thermochimiques de biomasse

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012167789A2 (fr) * 2011-06-10 2012-12-13 Steeper Energy Aps Procédé et appareil pour la production d'hydrocarbure liquide
WO2012167794A2 (fr) * 2011-06-10 2012-12-13 Steeper Energy Aps Procédé et appareil pour produire des hydrocarbures liquides

Family Cites Families (1)

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Publication number Priority date Publication date Assignee Title
DE102012005689B3 (de) * 2012-03-21 2013-08-22 Audi Ag Verfahren zum Versorgen eines Antriebsaggregats

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012167789A2 (fr) * 2011-06-10 2012-12-13 Steeper Energy Aps Procédé et appareil pour la production d'hydrocarbure liquide
WO2012167794A2 (fr) * 2011-06-10 2012-12-13 Steeper Energy Aps Procédé et appareil pour produire des hydrocarbures liquides

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
"2009 ASHRAE Handbook - FUNDAMENTALS (Inch-Pound Edition)", part Chapter 22 12 February 2009, ASHRAE, Atlanta USA, ISBN: 978-1-933742-54-0, article "PIPE SIZING", pages: 22.1 - 22.23, XP002727595 *
"JHF Pneumatic and Hydraulic Equipment", vol. 7, 1 April 2011, JOHN HENRY FOSTER, www.jhf.com, article "OIL FLOW CAPACITY OF PIPE & TUBING", pages: 1359 - 1359, XP055130338 *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018011139A1 (fr) 2016-07-11 2018-01-18 Steeper Energy Aps Procédé de production d'une huile renouvelable contenant de l'oxygène à faible teneur en soufre
US11459510B2 (en) 2016-07-11 2022-10-04 Steeper Energy Aps Process for producing low sulphur oxygen containing renewable oil
DK179314B1 (en) * 2017-02-08 2018-04-30 Steeper Energy Aps Pressurization system for high pressure treatment system
DK201770076A1 (en) * 2017-02-08 2018-04-30 Steeper Energy Aps Pressurization system for high pressure treatment system
DK201770074A1 (en) * 2017-02-08 2018-05-28 Steeper Energy Aps Pressure reduction in high pressure processing system
DK179391B1 (en) * 2017-02-08 2018-05-28 Steeper Energy Aps Pressure reduction in high pressure processing system
US11434933B2 (en) 2017-02-08 2022-09-06 Steeper Energy Aps Pressure reduction in high pressure processing system
US11829165B2 (en) 2017-02-08 2023-11-28 Steeper Energy Aps Pressurization system for high pressure processing system

Also Published As

Publication number Publication date
US20160091901A1 (en) 2016-03-31
CA2911975C (fr) 2022-05-31
US10108207B2 (en) 2018-10-23
CA2911975A1 (fr) 2014-11-13
EP2994649A1 (fr) 2016-03-16

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